Improvement in permutation-padlocks



dizzy/a, 490'? Ii -PETERS, PHOTWLITHOGRAPNER, WASHINGTON D O tinnedtatte JOHN TREAT, OF OXFORD, MICHIGAN.

, Letters Patent No. 93,501, dated August 10, 1869.

IMPROVEMENT IN PERMUI'ATION-PADLOCKS.

The Schedule referred to in these Letters Patent and making part of thesame.

To whom it may concern Be it known that 1, JOHN E. TREAT, of Oxford, inthe county of Oakland, and State of Michigan, have invented a new anduseful Improvement in Combination-Lock; and I do declare that thefollowing is atrue and accurate description thereof, reference being badto the accompanying drawings, and tothe letters of reference markedthereon, and being a part of this specification, in which- Figure 1 isan elevation of my device;

Figure 2 is a horizontal section of the same through the linew-a: infig. 1;

Figure 3 is a cross-section on the line y-y in fig. 2;

Figure 4 is an end view of one of the combinationrings;

Figure 5 isa plan view of the lock-bar;

Figure 6 is an end view and vertical section of one of the tumblers; and

Figure 7 is a vertical section of the pivoted end of the hasp on theline z-z in fig. 1.

The nature of this invention relates to an improvement incombination-padlocks operated without a key; and consists in a devicefor automatically holding the tumblers stationary while the lock isopen; and also, in combination therewith, certain tumblers, rings, and alock-bur, soconstructed and arranged as tomake a lock which shall beconvenient, durable, and difficult to be picked.

In the drawings A represents a hasp or yoke, to one end of which ishinged the lock-bar B.

0 is a slotted bolt, having a collar, D, at its end next the pivot.

Into the slot of the bolt is partiallyinserted the lockbar B, which hasa slot, 1), in its central part, through which passes a pin, 0, frointhe body of the bolt, allowing the latter to'slide a short distance onthe lock-bar.

On the free end of the bolt is secured a collar, E, provided with astud, d, which enters a recess, a, in the end of the hasp, as shown indotted lines in fig. 1.

F are annular tumblers, usually four in number, rotating on theslidingbolt G, and prevented from slipping ofi' by a collar, G, on itsend.

The lock-bar B is provided with four studs H, which project out of theslot in the sliding bolt 0.

The internal diameters of the tumblers are enlarged to half theirdepths, to form a recess, I, which permits the tumblers to rot-atefreely over the studs, which are in the enlarged end of the tumblerswhen the lock is closed.

J is a slot in the smaller diameter of the tumbler, which slips over thestud H.

W hen all the tumblers are so turned on thesliding bolt as to presenttheir slots to the studs H, the sliding bolt may be moved back on thelock-bar, withdrawing the stud d from the recess a of the hasp, and thebar swung open on its pivot.

It will be noticed, that unless the slots J in all the tumblers bepresented in line to the studs H on the lock-bar, the sliding bolt 0cannot be moved back.

The rotation of the tumblers is effected in the following manner:

Each tumbler is pro'videdwith an outwardly-projecting feather, L, inline with its slot J.

Each combination-ringKis marked on its periphery with the ten Arabicnumerals.

Under each numeral is a slot, M, allowing the rings to he slipped overthe tumblers, their feathers L entering the slots M of the rings, As therings K are rotated, they carry the-tumblers with them.

A line is marked on the collar D, denoting the position of the studs Hon the lock-bar B. To this line,

the line under the proper consecutive figures oi the combination mustbebrought to open the lock; -fig. 1,

.of the drawings, showing my lock ready to be opened on the combination1863.

On the collar D is alip, N, grooved on its under side,

as shown.

O .is a segmental flange on the hinge-end of the hasp.

When the bolt is drawn back in unlocking, this groove in the lipenga'geswith the flange, and when the bar is swung open, it prevents therotation of the tumblers, so that the device is ready to look when swungback, and especially usefulin changing the combination, which is done asfollows: p

The bar B being swung open, the collar E and com.- bination-rings Kremoved, a numberfiof four figures, is selected for the new combination.Each ring is successively slipped over the tumblers, taking care thatthe slot M. under the proper figure embraces the stud H of the tumbler.The collar E is replaced, the bar B swung forward, and the stud d causedto enter its recess in the l1asp.- A slight movement of the rings andtumblers prevents the lock-bolt 0 from being moved back until thetumblers are again brought to their proper relative positions.

hat I claim as my invention, and desire to secure by Letters Patent,is-- 1. In .combinationlocks,'the grooved lip N and the hasp A, whenprovided with the flange 0, arranged and operating in the manner andfor-the purpose herein set forth.

2. In combination with the above, the lock-bar 13, provided with studsH, the slotted bolt 0, and pin 0, collars D, G, and E, and bolt-stud d,the tumblers F, provided with the recesses I, slots J, and feathers L,and the co mbination-rings K, with their slots M, when constructed,arranged, and operating substantially as and for thepurpose's hereinshown and specified.

JOHN E. TREAT;

- Witnesses:

H. F; EBERTS, JAS. I. DAY.

